Used Komatsu 70-8 Excavator

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Komatsu PC70-8 Crawler Excavator Detailed Introduction

The Komatsu PC70-8 (commonly referred to as Komatsu 70-8) is a 7-ton class compact crawler excavator launched by Komatsu Ltd., the global top-tier construction equipment manufacturer, tailored for small and medium-sized construction scenarios. It integrates Komatsu’s decades of technical accumulation in power, hydraulic and structural design, featuring high reliability, low fuel consumption, flexible operation and strong adaptability, and has become one of the best-selling small excavator models in the global market.

Core Specifications (Standard Configuration)

Parameter	Specification
Operating weight	6,500 kg – 7,100 kg (varies with track and attachment configuration)
Rated power	48.5 kW / 2,200 rpm
Bucket capacity	0.12 m³ – 0.38 m³
Max. digging depth	4,080 mm
Max. digging height	7,150 mm
Max. dumping height	5,020 mm
Max. digging radius	6,260 mm
Swing speed	11 rpm
Travel speed	2.8 km/h (low) / 4.5 km/h (high)
Gradeability	35°
Ground clearance	350 mm

Power System

The PC70-8 is equipped with Komatsu’s independently developed SAA4D95LE-5 4-cylinder, water-cooled, 4-stroke turbocharged diesel engine, which meets EU Stage IIIA / US EPA Tier 3 emission standards:

Adopts high-pressure common rail fuel injection technology, which precisely controls fuel injection volume and timing to achieve sufficient combustion and low fuel loss.
Equipped with a multi-stage fuel filtration system, which can adapt to low-quality fuel in underdeveloped regions, effectively reducing the risk of engine failure.
Excellent cold start performance: it can start normally at -15℃ without a preheating device, and can be adapted to colder environments with an optional preheating kit.
Low noise and vibration design reduces operating noise while extending the service life of the engine.

Hydraulic System

It adopts Komatsu’s proprietary Closed-center Load Sensing System (CLSS), bringing industry-leading operational precision and efficiency:

Flow distribution is precisely adjusted according to actual operational demand, minimizing hydraulic loss, and ensuring smooth compound actions (such as simultaneous digging, swinging and lifting) without lag.
Equipped with pressure compensation valves, ensuring the speed of each actuator is not affected by load changes, and multiple actions can be operated independently without interference.
The pilot control system has light operating force and high response sensitivity, reducing the labor intensity of operators during long-time operation.
Supports optional quick couplers, which can realize replacement of different attachments within 2 minutes, greatly improving operation flexibility.

Structural Design & Durability

The PC70-8 is designed to adapt to harsh construction environments, with extremely high structural strength and durability:

The boom and arm are welded with high-strength wear-resistant steel plate, and subject to stress relief treatment, which can resist strong impact and deformation under heavy load conditions. Wear-resistant liners are added at hinge points to extend service life.
The X-type integrated undercarriage has excellent torsional resistance, and is equipped with reinforced track rollers and idlers, which can adapt to uneven construction sites such as mines and mountainous areas. The standard rubber track will not damage urban pavement, and a steel track with rubber pads is optional for heavy-duty conditions.
Equipped with a full undercarriage guard plate, which effectively protects the engine oil pan, hydraulic pipeline and other core components from collision damage.
Optional boom offset function: the boom can swing 65° to the left and 50° to the right, which is very suitable for operation in narrow spaces such as urban alleys, wall-side trenching and indoor demolition.

Operator Comfort & Safety

The cab is certified with ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure), which fully guarantees the personal safety of operators in case of rollover or falling objects.
The suspension adjustable seat with lumbar support can be adjusted according to the operator's height and weight, effectively reducing fatigue during long-term operation.
The ergonomic control layout and 3.5-inch color LCD monitor display real-time operation data including fuel consumption, water temperature, oil temperature and fault codes, making it convenient for operators to grasp the equipment status.
The high-power heating and cooling air conditioning system with multi-point air outlets, and the fully enclosed sound insulation design of the cab, keep internal operating noise lower than 75 dB(A), creating a comfortable operating environment.
Ultra-wide front and side windows provide 360° panoramic vision, effectively reducing operation blind spots and improving operation safety.

Energy Efficiency & Emission Performance

Equipped with Komatsu's exclusive ECO mode, which optimizes power and hydraulic output on the premise of ensuring operation efficiency, reducing comprehensive fuel consumption by 10%~15% compared with similar models of the same tonnage.
Auto idle function: when operation stops for more than 3 seconds, the engine automatically reduces to idle speed, reducing unnecessary fuel waste and exhaust emissions.
The comprehensive fuel consumption of the whole machine is only 5~7 L per hour under conventional working conditions, which greatly reduces operation costs for users.
The whole machine meets the latest noise emission standards, which is suitable for operation in residential areas and night construction, and will not cause noise disturbance.

Application Scenarios

The PC70-8 has a compact size and flexible maneuverability, which is widely used in:

Urban municipal engineering: pipeline laying, trench excavation, road maintenance, landscaping, tree planting pit digging
Civil construction: foundation excavation for rural self-built houses, site leveling, material handling
Water conservancy projects: ditch cleaning, irrigation canal excavation, small reservoir maintenance
Demolition and recycling: small building demolition, construction waste sorting and handling
Agricultural and forestry operations: land reclamation, wood handling, orchard management

Optional Attachments & After-sales Support

To meet diversified operation demands, Komatsu provides a full range of optional attachments for PC70-8: breaking hammer, hydraulic shear, ripper, grapple, log grapple, auger drill, narrow bucket, grading bucket, etc. The optional Komtrax remote monitoring system can realize real-time monitoring of equipment location, working hours, fuel consumption and fault information, which is convenient for fleet management.

In terms of maintenance, all maintenance points are arranged in positions accessible from the ground, and the replacement of wearing parts such as oil filters, fuel filters and air filters does not require climbing, which greatly reduces maintenance time. The long maintenance interval (engine oil replacement every 500 working hours, hydraulic oil replacement every 2000 working hours) also reduces downtime and maintenance costs for users. Supported by Komatsu's global after-sales network, users in all regions can get timely spare parts supply and technical support.

Non flooded

No accident

Original product

Used Komatsu 70-8 Excavator

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